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Novel polyvinyl-alcohol microsphere for everolimus delivery for subependymal giant cell astrocytoma. J Drug Deliv Sci Technol 2023. [DOI: 10.1016/j.jddst.2023.104204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Characterization of Gels and Films Produced from Pinhão Seed Coat Nanocellulose as a Potential Use for Wound Healing Dressings and Screening of Its Compounds towards Antitumour Effects. Polymers (Basel) 2022; 14:polym14142776. [PMID: 35890552 PMCID: PMC9315714 DOI: 10.3390/polym14142776] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 07/03/2022] [Accepted: 07/04/2022] [Indexed: 11/16/2022] Open
Abstract
The reuse of agro-industrial waste assumes great importance today. Pinhão is the seed of Araucaria angustifolia, which is native to the mountains of southern Brazil, Paraguay, and Argentina. The coat is a by-product of this seed and is rich in phenolic compounds. The present study aimed to use the residue as a precursor material for the production of nanocellulose through the mechanical defibrillation process and perform the characterization of the films and the gel to investigate the effect on the physical and regenerative properties when incorporated with polyvinyl alcohol (PVA). The modulus of elasticity was higher when the MFC of pinhão was added to the PVA. Film and gel had their cytotoxicity tested by MTT assay using 3T3 fibroblast and Schwann cancer cells, and a migration assay was also performed using the scratch test on HaCat keratinocyte cells. For the scratch test, film and gel samples with low concentration presented a complete scratch closure in 72 h. Molecular docking was performed and quercetin had the ideal interaction score values, so it was used with the PACAP protein which presented a slightly moderate interaction with the protein synthesis of Schwann cells, presenting compactness of the compound after 14 ns.
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de Lima GG, Júnior ELDS, Aggio BB, Shee BS, Filho EMDM, Segundo FADS, Fournet MB, Devine DM, Magalhães WLE, de Sá MJC. Nanocellulose for peripheral nerve regeneration in rabbits using citric acid as crosslinker with chitosan and freeze/thawed PVA. Biomed Mater 2021; 16. [PMID: 34330112 DOI: 10.1088/1748-605x/ac199b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 07/30/2021] [Indexed: 12/12/2022]
Abstract
This work investigates peripheral nerve regeneration using membranes consisting of pure chitosan (CHI), which was further blended with nanofibrillated cellulose, with citric acid as crosslinker, with posterior addition of polyvinyl alcohol, with subsequent freeze thawing. Nanocellulose improves the mechanical and thermal resistance, as well as flexibility of the film, which is ideal for the surgical procedure. The hydrogel presented a slow rate of swelling, which is adequate for cell and drug delivery. A series ofin vitrotests revealed to be non-toxic for neuronal Schwann cell from the peripheral nervous system of Rattus norvegicus, while there was a slight increase in toxicity if crosslink is performed-freeze-thaw. Thein vivoresults, using rabbits with a 5 mm gap nerve defect, revealed that even though pure CHI was able to regenerate the nerve, it did not present functional recovery with only the deep pain attribute being regenerated. When autologous implant was used jointly with the biomaterial membrane, as a covering agent, it revealed a functional recovery within 15 d when cellulose and the hydrogel were introduced, which was attributed to the film charge interaction that may help influence the neuronal axons growth into correct locations. Thus, indicating that this system presents ideal regeneration as nerve conduits.
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Affiliation(s)
- Gabriel G de Lima
- Programa de Pós-Graduação em Engenharia e Ciência dos Materiais-PIPE, Universidade Federal do Paraná, Curitiba, PR, Brazil.,Materials Research Institute, Athlone Institute of Technology, Athlone, Ireland
| | - Emílio L de S Júnior
- Programa de Pós-Graduação em Medicina Veterinária-PPGMV, Universidade Federal de Campina Grande, Campina Grande PB, Brazil
| | - Bruno B Aggio
- Departamento de Química, Universidade Federal do Paraná, Curitiba, Paraná, Brazil
| | - Bor Shin Shee
- Materials Research Institute, Athlone Institute of Technology, Athlone, Ireland
| | - Emanuel M de M Filho
- Programa de Pós-Graduação em Medicina Veterinária-PPGMV, Universidade Federal de Campina Grande, Campina Grande PB, Brazil
| | - Francisco A de S Segundo
- Programa de Pós-Graduação em Medicina Veterinária-PPGMV, Universidade Federal de Campina Grande, Campina Grande PB, Brazil
| | - Margaret B Fournet
- Materials Research Institute, Athlone Institute of Technology, Athlone, Ireland
| | - Declan M Devine
- Materials Research Institute, Athlone Institute of Technology, Athlone, Ireland
| | - Washington L E Magalhães
- Programa de Pós-Graduação em Engenharia e Ciência dos Materiais-PIPE, Universidade Federal do Paraná, Curitiba, PR, Brazil.,Embrapa Florestas, Colombo, Brazil
| | - Marcelo J C de Sá
- Programa de Pós-Graduação em Engenharia e Ciência dos Materiais-PIPE, Universidade Federal do Paraná, Curitiba, PR, Brazil.,Programa de Pós-Graduação em Medicina Veterinária-PPGMV, Universidade Federal de Campina Grande, Campina Grande PB, Brazil
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Development, Characterization and Cell Viability Inhibition of PVA Spheres Loaded with Doxorubicin and 4'-Amino-1-Naphthyl-Chalcone (D14) for Osteosarcoma. Polymers (Basel) 2021; 13:polym13162611. [PMID: 34451151 PMCID: PMC8401585 DOI: 10.3390/polym13162611] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/27/2021] [Accepted: 07/28/2021] [Indexed: 12/12/2022] Open
Abstract
Chalcones (1,3-diaryl-2-propen-1-ones) are naturally occurring polyphenols with known anticancer activity against a variety of tumor cell lines, including osteosarcoma (OS). In this paper, we present the preparation and characterization of spheres (~2 mm) from polyvinyl alcohol (PVA) containing a combination of 4′-Amino-1-Naphthyl-Chalcone (D14) and doxorubicin, to act as a new polymeric dual-drug anticancer delivery. D14 is a potent inhibitor of osteosarcoma progression and, when combined with doxorubicin, presents a synergetic effect; hence, physically crosslinked PVA spheres loaded with D14 and doxorubicin were prepared using liquid nitrogen and six freeze–thawing cycles. Physical-chemical characterization using a scanning electron microscope (SEM), differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) presented that the drugs were incorporated into the spheres via weak interactions between the drugs and the polymeric chains, resulting in overall good drug stability. The cytotoxicity activity of the PVA spheres co-encapsulating both drugs was tested against the U2OS human osteosarcoma cell line by 3- (4,5-dimethylthiazol-2-yl) -2,5-diphenyltetrazolium bromide (MTT) assay, and compared to the spheres carrying either D14 or doxorubicin alone. The co-delivery showed a cytotoxic effect 2.6-fold greater than doxorubicin alone, revealing a significant synergistic effect with a coefficient of drug interaction (CDI) of 0.49. The obtained results suggest this developed PVA sphere as a potential dual-drug delivery system that could be used for the prominent synergistic anticancer activity of co-delivering D14 and doxorubicin, providing a new potential strategy for improved osteosarcoma treatment.
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Aliabadi M, Chee BS, Matos M, Cortese YJ, Nugent MJD, de Lima TAM, Magalhães WLE, de Lima GG, Firouzabadi MD. Microfibrillated cellulose films containing chitosan and tannic acid for wound healing applications. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2021; 32:67. [PMID: 34117926 PMCID: PMC8197706 DOI: 10.1007/s10856-021-06536-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 05/28/2021] [Indexed: 06/12/2023]
Abstract
The effectiveness of tannic acid as antimicrobial and wound healing for burns have been shown for a century; however, uncontrolled target dosage may result in undesirable side-effects. Remarkably, tannic acid polyphenols compounds crosslinked with polymeric materials produce a strong composite containing the beneficial properties of this tannin. However, investigation of the crosslink structure and its antibacterial and regenerative properties are still unknown when using nanocellulose by mechanical defibrillation; additionally, due to the potential crosslink structure with chitosan, its structure can be complex. Therefore, this work uses bleach kraft nanocellulose in order to investigate the effect on the physical and regenerative properties when incorporated with chitosan and tannic acid. This film results in increased rigidity with a lamellar structure when incorporated with tannic acid due to its strong hydrogen bonding. The release of tannic acid varied depending on the structure it was synthesised with, whereas with chitosan it presented good release model compared to pure cellulose. In addition, exhibiting similar thermal stability as pure cellulose films with antibacterial properties tested against S. aureus and E. coli with good metabolic cellular viability while also inhibiting NF-κB activity, a characteristic of tannic acid.
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Affiliation(s)
- Meysam Aliabadi
- Department of Paper sciences and engineering, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
| | - Bor Shin Chee
- Materials Research Institute, Athlone Institute of Technology, Athlone, Ireland
| | - Mailson Matos
- Programa de Pós-Graduação em Engenharia e Ciência dos Materiais - PIPE, Universidade Federal do Paraná, Curitiba, Paraná, Brazil
| | - Yvonne J Cortese
- Materials Research Institute, Athlone Institute of Technology, Athlone, Ireland
| | - Michael J D Nugent
- Materials Research Institute, Athlone Institute of Technology, Athlone, Ireland
| | - Tielidy A M de Lima
- Materials Research Institute, Athlone Institute of Technology, Athlone, Ireland
| | | | - Gabriel Goetten de Lima
- Materials Research Institute, Athlone Institute of Technology, Athlone, Ireland.
- Programa de Pós-Graduação em Engenharia e Ciência dos Materiais - PIPE, Universidade Federal do Paraná, Curitiba, Paraná, Brazil.
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Aliabadi M, Chee BS, Matos M, Cortese YJ, Nugent MJD, de Lima TAM, Magalhães WLE, de Lima GG. Yerba Mate Extract in Microfibrillated Cellulose and Corn Starch Films as a Potential Wound Healing Bandage. Polymers (Basel) 2020; 12:E2807. [PMID: 33260883 PMCID: PMC7761128 DOI: 10.3390/polym12122807] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 11/17/2020] [Accepted: 11/24/2020] [Indexed: 11/25/2022] Open
Abstract
Microfibrillated cellulose films have been gathering considerable attention due to their high mechanical properties and cheap cost. Additionally, it is possible to include compounds within the fibrillated structure in order to confer desirable properties. Ilex paraguariensis A. St.-Hil, yerba mate leaf extract has been reported to possess a high quantity of caffeoylquinic acids that may be beneficial for other applications instead of its conventional use as a hot beverage. Therefore, we investigate the effect of blending yerba mate extract during and after defibrillation of Eucalyptus sp. bleached kraft paper by ultrafine grinding. Blending the extract during defibrillation increased the mechanical and thermal properties, besides being able to use the whole extract. Afterwards, this material was also investigated with high content loadings of starch and glycerine. The results present that yerba mate extract increases film resistance, and the defibrillated cellulose is able to protect the bioactive compounds from the extract. Additionally, the films present antibacterial activity against two known pathogens S. aureus and E. coli, with high antioxidant activity and increased cell proliferation. This was attributed to the bioactive compounds that presented faster in vitro wound healing, suggesting that microfibrillated cellulose (MFC) films containing extract of yerba mate can be a potential alternative as wound healing bandages.
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Affiliation(s)
- Meysam Aliabadi
- Department of Paper Sciences and Engineering, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan 00386, Iran;
| | - Bor Shin Chee
- Materials Research Institute, Athlone Institute of Technology, N37 HD68 Athlone, Ireland; (B.S.C.); (Y.J.C.); (M.J.D.N.); (T.A.M.d.L.)
| | - Mailson Matos
- Embrapa Florestas, Colombo 00319, Brazil; (M.M.); (W.L.E.M.)
| | - Yvonne J. Cortese
- Materials Research Institute, Athlone Institute of Technology, N37 HD68 Athlone, Ireland; (B.S.C.); (Y.J.C.); (M.J.D.N.); (T.A.M.d.L.)
| | - Michael J. D. Nugent
- Materials Research Institute, Athlone Institute of Technology, N37 HD68 Athlone, Ireland; (B.S.C.); (Y.J.C.); (M.J.D.N.); (T.A.M.d.L.)
| | - Tielidy A. M. de Lima
- Materials Research Institute, Athlone Institute of Technology, N37 HD68 Athlone, Ireland; (B.S.C.); (Y.J.C.); (M.J.D.N.); (T.A.M.d.L.)
| | | | - Gabriel Goetten de Lima
- Programa de Pós-Graduação em Engenharia e Ciência dos Materiais—PIPE, Universidade Federal do Paraná, Curitiba, Paraná 19011, Brazil
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